Spencer,
Apologies for the delay in responding.
Because the notebooks were identical at the source code level, there must be some other explanation, perhaps in the state of the notebook when it was last saved before being uploaded to the cloud.
I put your question into Google Gemini.
https://gemini.google.com/app/c69d9b57f7ca9cca
Note, I have not verified this solution. Both files are on your machine and best tested on your machine.
Here's what it proposed may have happened in your Workflow:
a) The notebook was opened on the desktop and the Manipulate cell was evaluated, creating the interactive output.
b) The Wolfram Desktop Front End automatically generated the necessary Dynamic Initialization Data (the section containing lines like Attributes[$CellContextcenter$] = {Temporary}`).
c) The notebook was then saved. This action captured the newly generated Dynamic Initialization Data inside the saved file.
The non-working notebook (tiltb.nb) likely missed the final step or was saved in a different state:
It may have been evaluated, but then the output cell was deleted or the notebook was closed without saving the evaluation state.
The most likely scenario is that the Manipulate cell was never explicitly evaluated on the desktop, or it was saved after a fresh open but before the Dynamic Data was generated and captured.
Proposed Solution
To ensure the notebook initializes correctly on the Cloud, you must guarantee that the Dynamic Initialization Data is captured in the saved file.
The key is a strict save-after-evaluation workflow for any notebook containing dynamic content intended for the Cloud:
a) Open the notebook on your desktop.
b) Run the Initialization Cell (loading your Graphics.wl package).
c) Evaluate the Manipulate Cell (or the entire notebook using Evaluation > Evaluate Notebook).
d) Confirm Output: Ensure the Manipulate output cell is visible and functioning correctly.
e) Save: Immediately save the notebook (File > Save). This step captures the necessary internal data.
f) Upload: Use this newly saved .nb file for deployment to the Wolfram Cloud.
Please let me know if this works!
